Explanation:
DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin.
Describe how the malarial parasite affects a red blood cell in a person without the sickle-cell mutation (3-5 sentences):
Answer:
Invasion by the malaria parasite brings about extensive changes in the host red cells. These include loss of the normal discoid shape, increased rigidity of the membrane, elevated permeability to a wide variety of ionic and other species, and increased adhesiveness, most notably to endothelial surfaces. Now, sickle cells have membranes, stretched by their unusual shape, that become porous and leak nutrients that the parasites need to survive and the faulty cells eventually get eliminated quite fast by the organisms, destroying the parasite along the way.
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identify the organelle where photosynthesis takes place
b
c
d
e
E.
Photosynthesis takes place in Chloroplasts
In plants, the process photosynthesis occurs in chloroplasts which contain the chlorophyll. The chloroplast is seen on the mesophyll of the leaves. So in the given figure, chloroplast is present in the part 'E'. The correct option is E.
What is photosynthesis?The process by which the autotrophs convert light energy into chemical energy which is later used to perform the cellular activities is defined as the photosynthesis. The chemical energy is stored in the form of sugars, which are produced from water and carbon-dioxide.
Photosynthesis generally takes place in the specialized structure called the chloroplasts which consist of chlorophyll. It is the chlorophyll which absorb light energy from the sun. The majority of chloroplasts is present in the leaves which absorbs sunlight for the photosynthesis to occur.
So chloroplast is found in all green plants and algae. They are called the food producers of plants. This cell organelle is not found in animal cells.
Thus the correct option is E.
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What’s the meaning of biology biological, and biologically means? Or are they all mean the same. If they do not mean the same then explain.
Observe the image. How are humans affecting the environment? (2 points)
Helping the environment by burning fossil fuels that pollute the air and water.
Harming the environment by destroying habitats and reducing the amount of oxygen in the air.
Helping the environment by building more homes and factories where people can live and work.
Harming the environment by planting more trees to provide shelter for humans
Clear demonstration of deforestation, the cutting down of trees in large quantities.
So, answer is:
Harming the environment by destroying habitats and reducing the amount of oxygen in the air.
Hope this helps!
Fear-inducing messages:
a.
often have the opposite of the desired effect.
b.
are generally ineffective.
c.
can increase persuasion.
d.
almost always have the desired effect.
Fear-inducing messages can increase persuasion. A fear request is a persuasive message that tries to provoke fear in order to divert behavior through the threat of upcoming danger or harm.
Are fear inducing messages effective?Fear messages that let the audience know they can achieve the urged behavior or that the behavior will have a positive result are more useful than fear request messages without word of recommended actions.
Thus, option "C" is correct, Fear-inducing messages can increase persuasion.
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Calculate the sum of the decreases of the electric potential along the path, and the sum of the electric potential increases. State the relationship between the two
The sum of the decreases of the electric potential along the path will be 2.004V.
How to calculate the sum of the electric potential?From the complete information, the total current(I) is given as:
= 2/(4 + 3 + 5)
= 2/12
= 0.167A
V3 = I × 3
= 0.167 × 3
= 0.501V
V4 = I × 4
= 0.167 × 4
= 0.668V
V5 = I × 5
= 0.167 × 5
= 0.835V
Therefore, the sum of the decreases of the electric potential along the path will be:
= 0.501V + 0.668V + 0.835V
= 2.004V.
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NEED HELP
Match the related items.
1.frontal lobe
2.medulla
3.thalamus
4.cerebellum
5.cerebrum
6.cerebral cortex
7.left hemisphere
neurons
electrical relay
voluntary muscles
right body
coordination
involuntary muscles
emotions/ visual/ thought
Matching the related items with their description
1. Frontal lobe : Voluntary muscles
2. Medulla : Involuntary muscles
3. Thalamus : Electrical relay
4. Cerebellum : coordination
5. Cerebrum : emotions/ visual/ thought
6. Cerebral cortex : Neurons
7. Left hemisphere : right body
Parts of the BrainThe Medulla is a stemlike structure which makes up the lower part of the brain. It connects the spinal cord to the brain and it is cone-shaped neuronal mass, it controls autonomc functions in the human body. The cerbral cortex is the outermist of the brain which controls the mental capability of a human.
Hence we can conclude that matching each item to its decription is listed above
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Why are beneficial nematodes considered beneficial to humans?.
The two types of tests that the dentist uses to determine whether the inflammatory process has gone into the periapical tissues are ____________ and ___________.
The two types of tests used by the denstist to determine whether the inflamatory process has gone into the peripical tissues are : Palpation and Percussion
What is Inflammatory process?Inflammatory process is response of the immune system such as the white blood cells respond to external stimuli ( harmful ) such as pathogens and cells that have damaged. To determine whether the process has gone into peripical tissues, palpation and percussion tests will be conducted.
Hence we can conclude that The two types of tests used by the denstist to determine whether the inflamatory process has gone into the peripical tissues are : Palpation and Percussion .
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Clouds are made up of water vapor
True
False
Which of the following aids in the weathering and transportation of rocks?
A.
electricity
B.
sunlight
C.
ice
D.
all of these
Answer:
D
Explanation:
Since thes all could transport them.
Which structure pumps out excess water and wastes in a paramecium.
Answer:
Contractile vacuole
Explanation:
Contractile vacuole pumps out excess water and wastes in a paramecium.
The structure that pumps out excess water and waste in a paramecium is called the contractile vacuole. The contractile vacuole is a specialized organelle that collects excess water and waste materials from the cell and then contracts and pumps them out of the cell through a pore in the cell membrane.
What is water's role?Paramecium is a single-celled organism that belongs to a group of organisms called protists. Like other cells, a paramecium must maintain a proper balance of water and solutes inside its cell to function properly. However, because paramecia live in freshwater environments that have a lower solute concentration than the cell, water tends to move into the cell by osmosis. If too much water enters the cell, it can cause the cell to burst, so the paramecium has developed specialized structures to help regulate the movement of water.
Hence, the structure that pumps out excess water and waste in a paramecium is called the contractile vacuole. The contractile vacuole is a specialized organelle that collects excess water and waste materials from the cell and then contracts and pumps them out of the cell through a pore in the cell membrane.
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How are viral diseases different from
other types of diseases ?
Answer:
Viral diseases require a vector so that they can spread from one person to another whereas other diseases can spread due to seasonal changes and other effects
Explanation:
What three criteria are used to determine whether something is a homology or analogy?.
Answer:
structure, relationship, development
Explanation:
Does this answer your question???
Which brain regions contain neurons involved in controlling complex and subconscious somatic motor patterns
Savanna climates would be ideal for people who enjoy open plains rather than oceans or mountains, and who also favor a steady climate with a narrow, yearly precipitation range.
Answer:
This is true
Explanation:
Savannas have less precipitation and more warm, consistent weather.
Which of these is made up of cells and tissues that perform a larger function?
Answer:
The answer is organs
Explanation:
an abiotic or biotic substance that causes disease?
How does most nitrogen get released back into the atmosphere during the nitrogen cycle?
A. Assimilation
B. Ammonification
C. Denitrification
D. Nitrification
Answer:
C
Explanation:
During a process called denitrification, nitrogen in gas forms, like nitrous oxide, are being released. Denitrification occurs if the nitrate is used when bacteria in the soil performs respiration.
A student conducted an experiment to test whether talking to plants would help them to grow faster. he set up the following two groups: group 1: spoken to and hand watered group 2: not spoken to and watered with sprinklers after three weeks, the plants in group 1 showed much more growth than those in group 2. based on the results of this experiment, which is the best conclusion? they are valid because the student ran a controlled experiment. they are not valid because the student did not control all the variables that can affect plant growth. they are valid because the dependent variable caused a change in the independent variable. they are not valid because the time frame to grow a plant is too short.
From the results in the experiment the best conclusion is : ( B ) they are not valid because the student did not control all the variables that can affect plant growth
Experimental varablesThe growth variables such as amount of light and amount of water need for the plants to grow effectively are not controlled in the experiment. The first group was hand watered while the second group was watered with a sprinkler therfore the amount of water reaching both groups are not the same therefore the experimental conclusion is not valid.
Hence we can conclude that From the results in the experiment the best conclusion is : ( B ) they are not valid because the student did not control all the variables that can affect plant growth.
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Answer:
B on edge
Explanation:
An individual heterozygous for cystic fibrosis (i.e., no disease sign) ____________________. A. cannot have children with cystic fibrosis B. is a carrier of cystic fibrosis C. cannot reproduce D. has cystic fibrosis
Answer:
B is a carrier of cystic fibrosis
Explanation:
Since cystic fibrosis is a recessive disease the person must have a mutation in both copies of the CFTR gene in order to have the illness.
Where would you find a strong acid on the pH scale?
A. 1
B. 5
C. 3
D. 13
Answer:
A. 1
Explanation:
pH is a measure of how acidic/basic a substance is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.
note: the closer you are to the neutral the weaker it gets.
What is unique about the sixth mass extinction many scientists believe we are entering?
A. caused by human activities
B. more species lost than ever before
C. impossible to prevent
D. occurring faster than any other mass extinction
Answer:
Scientists say it's caused by humans
Explanation:
It is entirely our fault
List an example of a food chain. Start with the sun, and include four organisms. What is a trophic level? What does trophic mean?
Answer:
Decayed plants - worms - birds - eagles.The four organisms are primary consumers, secondary consumers, tertiary consumers, and decomposers or phytoremediators.Trophic means involving, or feeding habits or food relationship of different organisms in a food chain.
Which organism in the table most easily causes an infection?.
Microbes are the organisms that is responsible and main cause of infection because these microbes uses it as a growth medium.
What organism cause infection?Many infectious diseases can be caused by microorganisms such as Bacteria and Viruses because these organisms lives and colonize in the infected parts.
So we can conclude that Microbes are the organisms that is responsible and main cause of infection because these microbes uses it as a growth medium.
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The average emission rates in the United States from burning coal are 13 lb/MWh (pounds per megawatt hour) of SO2 and 6 lb/MWh of NOx. (A pound is a unit of mass, and a megawatt hour is a unit of energy. ) Imagine that a scientist developed a new emission control device that can cut each of these emissions to 35% of the current output. If the device were installed, what would the average emission rates change to?
Answer:
The average emission of SO2 would be 4.55 lb/MWh, and the average emission of NOx would be 2.1 lb/MWh.
Explanation:
Answer:
With a NOx release speed of 2.1 lb/MWh, the run-of-the-mill SO2 spilling over rate would be 4.55 lb/MWh.
Explanation:
This is Plato answer but slightly paraphrased.
What do a mushroom, an amoeba, and a 6th grader have in common?.
Answer:
They are all composed of one or more cells.
Explanation:
What layer of the blood vessel wall is composed of areolar connective tissue containing elastic and collagen fibers
Hey There! Hope you are having a GREAT day!
Your question was.... "What layer of the blood vessel wall is composed of areolar connective tissue containing elastic and collagen fibers"
Your answer is the Tunica intima, Because, The blood vessel's tough outer layer is made up of connective tissue, which permits it to withstand stresses occurring on the vessel wall. It also contains strong collagen fibers that help bind the blood vessel to surrounding tissues, providing stability to the vessel.
I really hope this helps! :)
a) Explain how the various teeth are adapted for nutrition on mammals. (8mks)
Answer:
Incisor sharp chisel shaped for biting and cutting food one root for support in the jaw bone Canines long sharp pointed for holding prey piercing and tearing flesh from prey single root for support in the jaw bone Premolars large/wide to increase surface area for grinding food highly cusped to increase surface area for grinding food; two roots for firm support/anchorage in the jaw bone molars large/wide to increase surface area for grinding food highly cusped to increase surface area for grinding food Max. 20
What is the process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell?.
Answer: Meiosis is a process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. Meiosis usually involves two distinct divisions, called meiosis I and meiosis II. By the end of meiosis II, the diploid cell becomes four haploid cells.
Explanation: